Airspace around the Swiss village of Davos is restricted as part of the World Economic Forum every year. The amendment to the Austrian AIP instructs pilots who would still like to cross the affected airspace as follows:
(...) flight plans have to be addressed additionally to: LOWWYWYW
How do I "address my flight plan" to a station other than the ATC at dept./arr. airports? The code given is also too long for an ICAO airport?